Improvement in lard-coolers



W. P. HARVEY.

LAR'D COOLER. 7

No.189,032. Patented April 3, 1877.

UNITED STATES PATENT OFFICE,

WILLIAM P. HARVEY, OF BALTIMORE MARYLATTD.

IMPROVEMENT IN LARD-COOLERS.

' Specification forming part of Letters Patent N 0. 189,032, dated April3, 1877; application filed February 9, 1877.

To all whom it may concern:

. Be it known that 1, WILLIAM P. HARVEY, of the city of Baltimore, inthe State of Maryland, have invented a new and useful improvement inLard-Coolers, which improvement is fully set forth in the followingspecification and accompanying drawing, in which- Figure 1 is aperspective view of a lard-cooler with my improved compartments andagitators. Fig. 2 is a transverse vertical section of the same with theagitators. perspective view of one of my agitators.

A A represent the ordinary outside form of the lard-cooler. B Brepresent the hollow partitions, by means of which I divide the sameinto separate compartments. 0 G G are the agitators, one of which isplaced in each compartment.

It will be seen that the partitions of the compartments are hollow, asis the outside of the cooler, the whole being constructed of metaladapted for the purpose. Through the hollow Walls of these partitionscold water is kept in constant flow by means of pipes, through which thewater is forced.

The advantages of this subdivision of the cooler into compartments inthis manner are a large increase of water-surface, contact with whichfacilitates the cooling of the boiling lard, and economy in adaptationto use in a single compartment for a smaller quantity of material thanis necessary to fill a whole coolor of the usual. construction.

The agitators (l G 0, Fig. 3, are of peculiar Fig. 3.is a.

1 construction, acting somewhat on the principle of a screw propeller.They are madeof sheet or rolled metal, of sufficient thickness to bearthe strain, and open enough to permit the melted lard to pass throughthe fans, which are fastened to an axle, which runs across eachcompartment. These agitators each fit into the separate compartments asclosely as may be necessary to bring all the contents thereof withintheir reach, and have 'an arm or projection, both front and rear, on

I claim as new, and desire to secure by Letters Patent, is-

A lard-cooler provided with an inclosingjacket chamber, a series oftransverse curved hollow partitions communicating therewith, suitableinlet and outlet pipes for the admission and discharge of therefrigerant, and a series of revolving spiral agitators t'or promotingthe rapid cooling of the lard, the several parts being relativelyarranged substantially as herein set forth.

WILLIAM P. HARVEY.

Witnesses:

JOHN S. HANNAH, VICTOR O. ARMSTRONG.

